From fa12a0c6cee88d8aa3e86591f1f18b79bed698ab Mon Sep 17 00:00:00 2001
From: ghpzin <ghpzin@gmail.com>
Date: Tue, 9 Dec 2025 10:20:28 +0300
Subject: [PATCH] scalapack: fix build with gcc15

- add patch from merged upstream PR:
https://www.github.com/Reference-ScaLAPACK/scalapack/pull/139
https://github.com/Reference-ScaLAPACK/scalapack/commit/0cd017afa3eefd0597cfe71b7bcfd6356a258da2

Upstream issue:
https://www.github.com/Reference-ScaLAPACK/scalapack/issues/129

Fixes build failure with gcc15:
```
/build/source/TOOLS/reshape.c: In function 'Creshape':
/build/source/TOOLS/reshape.c:32:4: error: too many arguments to
function 'Cblacs_gridinfo'; expected 0, have 5
   32 |    Cblacs_gridinfo( context_in, &nprow_in, &npcol_in, &myrow_in, &mycol_in );
      |    ^~~~~~~~~~~~~~~  ~~~~~~~~~~
/build/source/TOOLS/reshape.c:15:9: note: declared here
   15 |    void Cblacs_gridinfo();
      |         ^~~~~~~~~~~~~~~
/build/source/TOOLS/reshape.c:63:14: error: too many arguments to
function 'Cblacs_pnum'; expected 0, have 3
   63 |       pnum = Cblacs_pnum( context_in, myrow_old, mycol_old );
      |              ^~~~~~~~~~~  ~~~~~~~~~~
/build/source/TOOLS/reshape.c:16:8: note: declared here
   16 |    Int Cblacs_pnum();
      |        ^~~~~~~~~~~
/build/source/TOOLS/reshape.c:65:7: error: too many arguments to
function 'proc_inc'; expected 0, have 5
   65 |       proc_inc( &myrow_old, &mycol_old, nprow_in, npcol_in, major_in );
      |       ^~~~~~~~  ~~~~~~~~~~
/build/source/TOOLS/reshape.c:14:9: note: declared here
   14 |    void proc_inc();
      |         ^~~~~~~~
/build/source/TOOLS/reshape.c:66:7: error: too many arguments to
function 'proc_inc'; expected 0, have 5
   66 |       proc_inc( &myrow_new, &mycol_new, nprow_new, npcol_new, major_out );
      |       ^~~~~~~~  ~~~~~~~~~~
/build/source/TOOLS/reshape.c:14:9: note: declared here
   14 |    void proc_inc();
      |         ^~~~~~~~
/build/source/TOOLS/reshape.c:70:4: error: too many arguments to
function 'Cblacs_get'; expected 0, have 3
   70 |    Cblacs_get( context_in, 10, context_out );
      |    ^~~~~~~~~~  ~~~~~~~~~~
/build/source/TOOLS/reshape.c:17:9: note: declared here
   17 |    void Cblacs_get();
      |         ^~~~~~~~~~
/build/source/TOOLS/reshape.c:73:4: error: too many arguments to
function 'Cblacs_gridmap'; expected 0, have 5
   73 |    Cblacs_gridmap( context_out, grid_new, nprow_new, nprow_new, npcol_new );
      |    ^~~~~~~~~~~~~~  ~~~~~~~~~~~
/build/source/TOOLS/reshape.c:18:9: note: declared here
   18 |    void Cblacs_gridmap();
      |         ^~~~~~~~~~~~~~
...
```
---
 pkgs/by-name/sc/scalapack/package.nix | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/pkgs/by-name/sc/scalapack/package.nix b/pkgs/by-name/sc/scalapack/package.nix
index 408337773ba7..049eff90a8d8 100644
--- a/pkgs/by-name/sc/scalapack/package.nix
+++ b/pkgs/by-name/sc/scalapack/package.nix
@@ -46,6 +46,14 @@ stdenv.mkDerivation (finalAttrs: {
       url = "https://github.com/Reference-ScaLAPACK/scalapack/commit/c3d6b22b0032fd2b8772d99c2239c18473e197a7.patch";
       hash = "sha256-935KtaqPO2cghbD9Z8YMxGGOQJo1D1LqTje6/IL4bGI=";
     })
+
+    # Fix build with gcc15
+    # https://github.com/Reference-ScaLAPACK/scalapack/pull/139
+    (fetchpatch {
+      name = "scalapack-fix-function-declaration-arguments.patch";
+      url = "https://github.com/Reference-ScaLAPACK/scalapack/commit/0cd017afa3eefd0597cfe71b7bcfd6356a258da2.patch";
+      hash = "sha256-uUdazKplDt8K5yuVaHX5pLFqDMh0F7eBBGEHfxOiM0Y=";
+    })
   ];
 
   # Required to activate ILP64.